Is a woman who is reciting the Quran and passes by a verse of prostration (Ayat as-Sajdah) required to prostrate if she is not wearing a head covering?

It is recommended for a woman to perform the prostration of recitation (sajdat al-tilawah) while her head is covered. However, there is no harm if she prostrates without a head covering, because the prostration of recitation does not have the same ruling as prayer; rather, it is an act of humility and drawing closer to Allah.